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That first 640-grain arrow was not exactly lightweight. Shows nice balance of mass and speed. I'm reminded of your arrow ballistic chart and the sweet spot of around -- what? -- 9- or 10-grains per pound for optimum speed and momentum.

But that 1415-grain beast was kind of ridiculous. Thinking your 98-lb bow would do a lot better with it. Seems that a certain amount of speed is still required to propel a certain mass and carry the momentum needed for good penetration.

I believe this was the neighborhood of arrow weight Howard Hill used on elephants, but he was using a 115-lb bow. Also, I think Shiloh said he was looking to get 950- to 1000-grain arrows tuned for his 76-lb bow to go after Cape Buffalo. Just recollecting this off the top of my head, so feel free to correct if I'm misremembering.

I didn't expect that, but I expected it to do better than it did.
I actually shot it twice, with the same results both times.

Rick

Hmmm.. Yeah I'm surprised. Most of the stuff I read says that heavy, high FOC, arrows penetrate deeper than lighter/lower. Mine are 9GPI and 17%FOC and I like them. If I can find a blue barrel I'll try your challenge.

Chronograph the arrows and let's see what the speed of each is as shot from your bow.

The 640gr averages 208.
No idea what the heavy is doing. It's slow for sure, but I don't have a working chronograph, or access to one right now to see just how slow.

I actually never planned on doing the super heavy arrow shot, but was asked to by someone on another forum, so I did. Pretty much knew what the result would be, but expected it to be a little better than it was.

I'm not trying to prove anything by doing this. I just thought of it, thought it would be interesting to see what would happen, and even more interesting to see other do the same thing with their setups.

I plan to sometime soon do it with the same 640gr arrow with a few different design 175gr broadheads just to see what penetration differences (if any) there will be between them.

Almost forgot about my old blue barrel dog house. Here's what a 700-grain 31" carbon arrow, with 300 grains of Tuffhead 2-blade broadhead will do from 20 yards when shot out of a 70-lb recurve (67 or so at my 27" drawlength). I'm pleased and ready to book a hunt for the elusive Blue Wildebarrel.

Forgot to mention that arrow actually has 400 grains up front, with the 100-grain brass insert that the 225-grain broadhead with 75-grain screw-in adapter are screwed into. FOC % is around 26%, as I recall -- not quite Ultra High FOC, but is Extreme FOC.

Thanks for the correct details, Rick. And yes it is the Weathers bow. I'm on the road to Arkansas to watch my son's college baseball team Univ. of Neb. - Kearney (he's a pitcher). So, kinda hard to communicate. Stopped for gas now, btw.

I saw this on the Leatherwall. Interesting stuff. I need some things yet to be ready to start shooting or I would try to track down a barrel and see if my 45# would even punch a broadhead through one side lol.

One shot with a 175gr Grizzly Right Single Bevel, and one with a 175gr VPA 3 Blade.

I used the same 640gr arrow that I used for the 175gr Bishop Archery Right Single Bevel.

Everything about this arrow is the same, except for the changing of the broadheads.

What does this all prove? Probably nothing to a lot of folks.

What did I learn from it? I learned I can have full confidence in my hunting rig for most animals, and I learned, that the only real significant difference the broadheads make are the shape of the holes they cut.

Here's the Grizzly video:

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Looking at the entry/exit views shows that the single bevels are slicing AND twisting and cracking the plastic beyond the actual blade path as they penetrate, where the three blade mainly cuts its way through. It's my understanding that the twisting action is a major design element to break bone by splintering it if encountered.

Looking at the entry/exit views shows that the single bevels are slicing AND twisting and cracking the plastic beyond the actual blade path as they penetrate, where the three blade mainly cuts its way through. It's my understanding that the twisting action is a major design element to break bone by splintering it if encountered.

Rick: maybe it's my phone pic, but there seems to be a mark or distortion of the plastic immediately below the center of the broadheads on the entry views for both the Bishop and Grizzly heads -- shaped like a tornado vortex.

Rick: maybe it's my phone pic, but there seems to be a mark or distortion of the plastic immediately below the center of the broadheads on the entry views for both the Bishop and Grizzly heads -- shaped like a tornado vortex.

Sent from my SM-J327V using Tapatalk

That is real thin plastic trailers, that folded out when I pulled the arrows.
Probably caused by the plastic melting some from the friction of the penetrations.